NXP Semiconductors NX5P1000UKZ

Overview

NX5P1000UKZ from NXP Semiconductors is a logic-controlled high-side power switch with integrated ESD protection and comprehensive fault management for USB OTG power domain isolation. It features 3 V–5.5 V operation, 1 A continuous switch current, 100 mΩ max R_ON at 4.0 V, 30 V VBUS tolerance, and active protection against overvoltage (5.75 V), undervoltage (3.2 V), overtemperature (125 °C), reverse bias, and in-rush current - deployed in portable battery-powered USB OTG host devices.

For engineers reviewing the NX5P1000UKZ datasheet, NX5P1000UKZ pinout, NX5P1000UKZ application, or NX5P1000UKZ equivalent, this page delivers verified functional identity, WLCSP12 package mapping, validated terminal roles, real-world USB OTG use context, and two confirmed alternative parts with documented technical and application differences.

Technical Context

The NX5P1000UKZ implements an N-channel MOSFET-based high-side switch with analog voltage monitoring (VDET), open-drain fault signaling (FAULT), and programmable current limiting via external resistor on ILIM. Its control architecture integrates independent UVLO (active below 3.2 V) and OVLO (active above 5.75 V), both referenced to VINT, with hysteresis and automatic recovery behavior.

Protection functions operate in layered priority: UVLO remains active in low-power mode (EN = LOW); OTP disables switching irreversibly until junction cools to 115 °C; RCP triggers when VBUS exceeds VINT + 30 mV for >4 ms; OCP responds within 2 µs to load current > I_OCP or VBUS < VINT − 200 mV. All protections assert FAULT (open-drain, active LOW) with automatic release upon fault clearance.

Key Specifications

Pinout & Package

Package: WLCSP12 (Wafer-Level Chip-Scale Package), 1.36 mm × 1.66 mm × 0.51 mm, 0.4 mm pitch, backside coating included.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side USB power switch applications.

Compared with TUSB2036IRHBR and TPS2051BDBVR, the NX5P1000UKZ uniquely integrates USB-specific ESD protection on D+/D−/ID, analog VBUS monitoring (VDET), and programmable reverse-bias detection - eliminating four external components and enabling full USB OTG compliance in minimal footprint.

Availability

NX5P1000UKZ is available at Aetrix Electronics and suitable for USB OTG host implementations, battery-powered portable hubs, and USB-C dual-role power management systems requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for NX5P1000UKZ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and consumer applications.

The NX5P1000UKZ belongs to NXP's USB power management product line, engineered specifically to simplify USB On-The-Go implementation by integrating high-side switching, fault protection, and ESD-hardened interface pins in a wafer-level package.

FAQ

What is the primary function of the NX5P1000UKZ in a USB OTG system?

The NX5P1000UKZ serves as a logic-controlled high-side power switch that isolates the internal VINT supply from the external USB VBUS connector. It enables safe VBUS sourcing during host mode while providing real-time fault detection-including overvoltage, undervoltage, overtemperature, reverse bias, and overcurrent-and asserting FAULT to the system controller. The NX5P1000UKZ is essential for meeting USB OTG power integrity and safety requirements.

How does the NX5P1000UKZ handle reverse current flow from VBUS to VINT?

The NX5P1000UKZ implements reverse bias current protection (RCP) that disables the internal N-channel MOSFET when VBUS exceeds VINT + 30 mV for longer than 4 ms or rises above VINT + 0.45 V. This prevents back-driving of the VINT supply-critical when a peripheral supplies power to the OTG device. The FAULT pin goes LOW during RCP activation, and the switch automatically recovers once VBUS falls below VINT for >4 ms.

Can the NX5P1000UKZ be used with a 1.8 V microcontroller GPIO for the EN pin?

Yes. The NX5P1000UKZ includes integrated logic-level translation on the EN input, supporting 1.8 V CMOS-compatible signaling even when VINT is at 3.3 V or 5 V. The EN pin accepts VIH ≥ 1.2 V and VIL ≤ 0.4 V across the full temperature range, allowing direct connection to low-voltage processors without external level shifters-reducing BOM count and layout complexity for the NX5P1000UKZ design.

What is the purpose of the VDET pin on the NX5P1000UKZ?

The VDET pin provides an analog voltage output (1.5 V to 5.5 V) proportional to the VBUS voltage, enabling the host microcontroller to monitor VBUS level in real time. Unlike digital fault flags, VDET allows precise determination of VBUS presence, magnitude, and stability-supporting USB enumeration timing checks, charger detection, and dynamic power policy decisions. The NX5P1000UKZ VDET output remains functional regardless of EN state or fault conditions.

Does the NX5P1000UKZ require external components to operate safely in a USB OTG design?

Yes. The NX5P1000UKZ requires an external pull-up resistor on the open-drain FAULT pin (20–200 kΩ to VINT), an external resistor on ILIM to set overcurrent threshold (40–300 kΩ), and proper PCB thermal design (solid GND/power planes, vias under package). While it integrates ESD protection on D+/D−/ID pins, system-level IEC61000-4-2 compliance may still require additional TVS diodes depending on end-equipment requirements. These dependencies are fully documented for the NX5P1000UKZ in its official datasheet.